User’s Guide> 76DEALING WITH UNSATISFACTORY PRINTINGSYMPTOMS POSSIBLE CAUSES STEPS TO TAKEVertical white linescan be seen on theprinted page.The LED head is dirty. Wipe the LED head with aLED lens cleaner or with asoft cloth.The toner is low. Replace the toner cartridge.Foreign materials maybe present in the imagedrum.Replace the image drumcartridge.Light-shielding film ofthe image drumcartridge is dirty.Wipe the film with a LEDlens cleaner or with a softcloth.Printed images arefading vertically.The LED head is dirty. Wipe the LED head with aLED lens cleaner or with asoft cloth.The toner is low. Replace the toner cartridge.The paper is notsuitable for the printer.Use recommended paper.Printing is light. The toner cartridge isnot properly seated.Reinstall the tonercartridge.The toner is low. Replace the toner cartridge.The paper is moist. Use paper stored in propertemperature and humidityconditions.The paper is notsuitable for the printer.Use recommended paper.Thickness and type ofpaper are inappropriate.Set a proper value for[Media Weight] and [MediaType] in the menu setup, orset one value thicker for[Media Weight].Recycled paper is beingused.Set one value thicker for[Media Weight] in the menusetup.Partially fadedimages. Whitespots and linesappear in solidprinting.Paper is moist or dry. Use paper stored in propertemperature and humidityconditions.